1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69178f0849369bc208b54de4fbdfc5f4a303a5d0aaddc42d0c158558c87c51f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4337078-c788-4c4b-9594-7006c0b17b8c.json and https://artists.proofprofile.net/proofs/artist/b4337078-c788-4c4b-9594-7006c0b17b8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5412907b8151c9333d0a59041ffd8c9196926865b12dbbd9cdc0385bea9276. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6076c483712834bb0cb92a863cc5e9a99d994125b348f59cf6b64d099856aeed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814458.
Auf der Bordsteinkante (Nachts um halb eins)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a73f4f0179fb232884707b2ddfe279108de3ca50f183f0320e510e0ec996f19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1f861601ef43e810ce54480ee6f1aa9182c573d17f091974a8ad6eb77043e. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:31:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e3daea80935d8a66ca34c0f746cdda05675c1c7eaaa50f6cc2f8f9aa496e3b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4441579ed5bc66b5c3cbfa57d9096a7a9bcb2000574ef654de99636cad2071. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ650814478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63aa6a562e6ce3f025fd1ac4b8a4605357d9045517b70786d72406e4435596a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd642621ba728570877413bff76dbd61565333f556b72f353c5b8679c52e4845a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a482f77657396ddb1bd2e570849006757c64f41f1f235cbff4a1f8456dff9d. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:05:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a78441f4fa24e4d1ea2fed375a32ed014f0ca58c6a67ca5d7c63a2ca83a186. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd029baecb106710a354c8aa606ee8d328dc2a5f8fc3d0fb5baef2f93adc19910. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc7f95739b6297d56d9bef6e5d92858d2fbc74a4faa22f0a0b8d1fda840302d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071a58d4b80a17d00ae981991f3a47681d73828b3e43153ddc074b0b4de798d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74902b59628d8af07e3e934fc1a88ffb7d45dbc29ab4649d5231b23dd40e4389. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bf059c90e3f784974c038b11bd003116e95910a04c421fbd64e7202694cf6a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:29:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608787.
Das halbvolle Glas des Kulturpessimismus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20af618b2cec284202de2d4969d88f1b449f0945e3acf6b932869905a8ef8681. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2a8be5d2c76fbd1916e22852544f664115c40066db72a128d472deaca8907. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50008a6ff227d202265dfe17a8bd3cf87d818e1dc5f8d131599ebb531632f340. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4814b9f80470299dfa0c7911335d755fbeeaec86300314b1c880c5c69284588a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:28:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d03ba7749d1953a6215758068764b5e3ae4aa94b9a45c4eca55fd164355823. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651608713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada3cb85b0b7b6512df994a8dd65571239140adb9f6b77ec759a353c0c252f17. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2015897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e891e808db8a71fa9a4a6d883b3baa5de382bef0140eaaff4f63c0bcc0df6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee8fc034d8987c2e5fe8725e0760a92d73c02fd9b12ebd37947053f0f7e4af. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d58002abca1de5fbc2e392498a2cc06b5cb081f0625544a909403b1be623bc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b10070809653e2a65e3e7dabda5dd04087b565a8218015ff2ada1e1f90545e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc63f78c75c6c5f394f519e097a042ea3b5207ba93ee2bfc8eccfb91a4c31b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4bbc636567c012541acb4f04808061bc5f621beba637e899eb87f9904a524. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cac1d43392752bb6657b634706aaad1a9fb1a01f26d143869078449771abaee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2208638.